A self-described Massachusetts “political activist” was arrested Monday night and charged with sending a threatening e-mail to Florida Rep. William Snyder, R-Stuart, an hour after the Arizona shooting that killed six and critically injured U.S. Rep. Gabrielle Giffords.

The unsigned e-mail, sent to Snyder’s state House of Representatives address on Jan. 8, told the legislator to “stop that ridiculous law if you value your and your familie’s lives.”

Snyder has proposed a bill cracking down on illegal immigration for Florida in a manner similar to what Arizona has done.

Snyder said Tuesday he reported the e-mail to the Martin County Sheriff’s Office and state Capitol security officials in Tallahassee.

According to TCPalm.com and other published reports, the Martin County Sheriff’s Office said Tuesday that Manuel E. Pintado, 47, of Northampton, Mass., used a public access wireless connection at a Starbucks a few blocks from his home to send the e-mail.